rush:: a cross-platform command-line tool for executing jobs in parallel

% echo tb-question-colours-1417199-2023-06-30-23-56-27-80x55.text ¦ \
rush 'echo {@([0-9]+).text$}'
55
ls -1 *.rgba ¦ rush --dry-run 'echo magick -depth 8 -size 80x{@([0-9]+).rgba$}' {} {.}.png
ls -1 *.rgba ¦ rush 'magick -depth 8 -size 80x{@([0-9]+).rgba$}' {} {.}.png